David Walsh Blog

• By David WalshNovember 24, 2020

  What I’m Thankful For: 2020 Edition

  My parents loathe when I use poor language but luckily they don't read this blog so I'll just be blunt: 2020 has been an absolute shit show. COVID-19 has been a world-wide source of devastation to lives, jobs, and our quality of life. That...

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• By David WalshNovember 24, 2020

  Use a Submit Button Outside of a Form!

  Have you ever felt like you've been a professional developer or designer forever, and somehow not known something basic, and borderline hate yourself? That's me with a trick that was introduced to me by Miguel Piedrafita:🔥 You can submit forms from a button outside of...

• By David WalshNovember 23, 2020

  Detect Generator Functions with JavaScript

  In the current JavaScript climate of new syntaxes, features, and using loads of external libraries, it seems harder than ever to be sure what your functions are being given or even what the data represents. Of course, we've come up with Flow and TypeScript to help...

• By David WalshNovember 18, 2020

  git: Remove Untracked Files

  I've always said that I know just enough about git to get the job done, but also do something destructive. Nothing embodies that more than my recent mistake. I somehow found a git repository full of untracked files and git stash wouldn't fix it.

• By David WalshNovember 13, 2020

  Node isConnected

  Every so often I discover a property in JavaScript objects that I didn't know existed, oftentimes using another trick to accomplish the same functionality. One such property I just learned about was isConnected, a node property that attached to a context (i.e. document).Here's how to...

• By David WalshNovember 3, 2020

  Limit Promise Concurrency with pool

  Methods like Promise.all, Promise.allSettled, Promise.race, and the rest are really excellent for managing multiple Promises, allowing for our apps to embrace async and performance. There are times, however, that limiting the number of concurrent operations may be useful, like rate limiting or simply not wanting...

• By Todd GardnerOctober 28, 2020

  How Hacker News Crushed David Walsh Blog

  Earlier this month, David’s heartfelt posting about leaving Mozilla made the front page of Hacker News. Traffic increased by 800% to his already-busy website, which slowed and eventually failed under the pressure. Request Metrics monitors performance and uptime for David’s blog, and our metrics...

• By David WalshOctober 26, 2020

  Detect Changed Files with git

  There are numerous reasons to want to know which files have been added or modified in a git repository, one of which is your text editor highlighting those files. Another use case is running tasks against only files which are presently changed, like lint or...

• By David WalshOctober 20, 2020

  cookieStore: Async Cookie API

  One pattern in the JavaScript API world that web development veterans will notice is that we've been creating new methods to accomplish what older, grosser APIs once achieved. XMLHttpRequest became the fetch API, some APIs like Battery became async, and there are dozens of other examples.

• By David WalshOctober 19, 2020

  How to Prevent Pasting into an Input

  Every once in a while I get to a website that doesn't allow me to paste into a form input. In most cases it's something to do with login credentials (username and or password) and auth codes. So how are they preventing me from...